Probably the turn signal flasher
Could be the bulbs or the fuses or the flashers or the signal switch assembly
Probably a wiring issue between the turn signal and the lights.
Check bulbs they are double filamented smaller for brake/ turn signals Check the sockets for corrosion Check for power and ground to sockets Could be a problem in the steering column switch
this car may have separate flashers for the turn signals and the emergency flashers
in dash lights
Flasher relay bad. This is a separate flasher relay from the one controlling the hazard lights.
hazards and turn signals have separate flashers. replace flasher for turn signals
Double check the wiring diagrams for your vehicle but it's probable the flashers and signals use the same relay to function. The wiring for your flashers will go through the hazard switch which is where the malfunction is. If you replace the switch your problem should be solved.
4 way flashers and turn signals both have a "flasher can" in the system to make the lights flash the turn signal and 4 way flashers are controlled independantly of each other try replacing the flasher can for the 4 way flashers it is obvious that the bulbs are ok because they work on turn signals
you may have blown the computer chip that regulates your lights its usually your hazard lights button that's the chip.
depends on which lights? inside over head? /Dash board?/Doors? /front headlights?/Flashers?/ turn signals?/ Backing lights?/ Parking lights?/ So which ones ? what Year??
Check your fuses.